It seems that PS4's are selling as quickly as they appear on the shelves. It's apparent that Sony took stock due to NA & EU to bolster the JP launch, once they reduce the shipments to JP, we should see stock rising in NA and EU to cope with demand. I fully expect 200k-250k WW for the PS4 next week, and then it will come done to around 150k on average for the next 3-4 weeks. I fully expect the XBone sales to gradually increase in preparation for Titanfall, and there may be a slight surge the week it releases, but I doubt sales will go over 120k WW in the biggest week.
Sony doesn't expect stock to properly meet demand until April and I honestly expect this to be the case. I now think PS4 sales in particular will be huge this year....I now think that the PS4 will have a somewhere between 15-17m total by the end of this year.
Prediction (June 12th 2017)
Permanent pricedrop for both PS4 Slim and PS4 Pro in October.
PS4 Slim $249 (October 2017)
PS4 Pro $349 (October 2017)